Here are the lyrics! The "..."s and "*"s are just so I know how to get the timing right, they're just there because I was lazy and didn't make all the lines scan perfectly.

We’re fin’ly finished being baffled … by quantum mechanics
And now we’re moving on to do some thermodynamics
We gotta’ learn bout all the laws – don’t worry, there’s just three
But the second’s what _I’m_ talkin’ ‘bout! So shout it: entropy!

Life can be quite messy as I’m sure you’ve all heard
So a few real smart scientists made up a real smart word
To describe the way disorder keeps increasing over time
They call this concept entropy, but I call it sublime.

It has a lot to do with … probability
‘Cause there’s limited arrangements in which matter can be
A few of these are organized but most as really not
So after some random motion entropy is what we’ve got!

But why does this result in more disorder, you may say…
Well I’ll use this box of marbles to explain another way.
We start out really ordered with one colour for each side
Now it’s time to shake things up! See where the marbles will reside.

Bridge … *shake shake shake*

Random *chance* made the marbles orga*nized* a whole lot less
Though it’s still not quite impossible they’d end up not a mess
But it’s just so damn unlikely that it borders on absurd
Almost _never_ gonna happen! So the second law’s observed.

“But wait!” I hear you think “Surely this law just makes no sense…
You cre*ate* order each time you make a building or a fence
Entropy is not increasing there! Your law is just not cool!”
Well hold up! I gotta add one more specific to this rule.

Proba*bil*ity dictates that always, some order is lost
And to go against the flow will take a high energy cost.
So *since* our sun keeps feeding us en*er*gy from outside
Order’s added to the system on the planet we reside. *dance*

When you try to decrease entropy – here’s something I must stress
The total order in the universe keeps on getting less
Though the house you built is orderly and may be looking sweet
You create still more disorder from the foods you had to eat.

Well this second law’s been proven so we’re pretty sure it’s true
Entropy will keep increasing irregardless what you do
So don’t worry with a dustpan and don’t bother with a broom
Because science proves it’s pointless when you try to clean your room.

http://www.youtube.com/watch?v=ZpR5_muFPqM&feature=channel